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  5. CVE-2026-24688

CVE-2026-24688: pypdf has possible Infinite Loop when processing outlines/bookmarks

January 26, 2026 (updated January 29, 2026)

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks.

References

  • github.com/advisories/GHSA-2q4j-m29v-hq73
  • github.com/py-pdf/pypdf
  • github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1
  • github.com/py-pdf/pypdf/pull/3610
  • github.com/py-pdf/pypdf/releases/tag/6.6.2
  • github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73
  • nvd.nist.gov/vuln/detail/CVE-2026-24688

Code Behaviors & Features

Detect and mitigate CVE-2026-24688 with GitLab Dependency Scanning

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Affected versions

All versions before 6.6.2

Fixed versions

  • 6.6.2

Solution

Upgrade to version 6.6.2 or above.

Impact 4 MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Learn more about CVSS

Weakness

  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Source file

pypi/pypdf/CVE-2026-24688.yml

Spotted a mistake? Edit the file on GitLab.

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